Substation having a plurality of line circuits mounted unified power flow controller

The present invention discloses a UPFC circuit mounted in the multi-line substations, mainly applied to a plurality of lines inside the substation, the substation comprises a plurality of strip lines, substations positive bus, sub-bus substation, UPFC UPFC , of UPFC bus, a plurality of circuit breakers and a plurality of isolation switches. By changing the disconnector closed and open state, so that in normal operation power, a flow controller may compensate for any line voltage substation and the control flow of the line, while the flexibility to switch between different lines; the emergency power case, the controller may flow independently of any loop consisting of two lines substation power flow control, emergency flow control function. The present invention enables a single switching control of the UPFC multiple trend lines, can not only save investment, improve the economics of grid operation, but also enhances the UPFC flexibility, help secure and stable operation of the grid.